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Balance Sheet Components - Components of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 8,962	$ 6,304
Less: accumulated depreciation and amortization	(2,755)	(1,651)
Total property and equipment, net	6,207	4,653
Laboratory and Manufacturing Equipment
Property Plant And Equipment [Line Items]
Total property and equipment, gross	2,028	1,509
Computer Equipment and Software
Property Plant And Equipment [Line Items]
Total property and equipment, gross	916	736
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Total property and equipment, gross	928	657
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property and equipment, gross	703	502
Internal-Use Software
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 4,387	$ 2,900

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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+ References

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-Topic 210
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-Section S99
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-Publisher FASB
-Name Accounting Standards Codification
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